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Effect of Non-Slip Socks-Induced Foot Stability on Agility in Healthy Elderly Women
Effect of Non-Slip Socks-Induced Foot Stability on Agility in Healthy Elderly Women
Tae-Seok Jeong;Chang-Hwa Joo
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OBJECTIVES The risk of falls increases due to decrease in balance ability in elderly. A safe environment that can prevent slipping in daily life is required to prevent falls. The purpose of this study is to analyze the effect of socks with non-slip pads on improving foot stability and balance in the elderly. METHODS Sixteen older women aged 67-87years complete tests while wearing non-slip socks and/or normal socks. Measurements were taken for body composition, static and agility/dynamic balance, and self-reported wearing sensation. RESULTS Agility/dynamic balance was higher in the non-slip socks group than that in the normal socks group (p<0.05). The static balances did not differ significantly between the two groups (p>0.05). There were no differences between the two groups in terms of comfort, thermal, wet, tactile, and fit sensations according to the wearing of the socks (p>0.05). Significant higher stability sensation was observed in non-slip socks group than normal socks group (p<0.05). CONCLUSIONS These results suggested that the use of non-slip socks will help to prevent falls that may occur during indoor or outdoor activities and also improve exercise performance in the elderly.
Effects of Unilateral Lower-extremity Joint Cooling on Movement Biomechanics during Two-legged Jumping and Landing
Effects of Unilateral Lower-extremity Joint Cooling on Movement Biomechanics during Two-legged Jumping and Landing
Jihyeon Choi;Kyeongtak Song;Hoon Kim;Sae Yong Lee;Jihong Park
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OBJECTIVES This study examined the immediate effect of unilateral ankle or knee joint cooling on the lowerextremity kinematics and kinetics during two-legged jumping and landing. METHODS Twenty healthy adults randomly completed three data collection sessions for ankle or knee joint cooling, or control. For each session, participants performed two-legged countermovement jumps and lands. For joint cooling, two ice bags were directly placed to the right side and secured with a compression bandage. A three-dimensional motion analysis system (200 Hz) with two floor-embedded force platforms (2000 Hz) was employed to capture the jumping and landing. The cooling effects on kinematical (flight time, and sagittal plane joint angles) and kinetical (peak vertical ground reaction force (vGRF), impulse, and sagittal plane joint moments) variables were examined. A mixed-model analysis of variance was performed for each dependent variable (p¡Â0.0001 for all tests). RESULTS We did not observe any interactions (flight time: F2,95=0.67, p=0.52; joint angles: F2,209¡Â2.26, p¡Ã0.10; peak vGRF: F2,209¡Â1.76, p¡Ã0.20; impulse: F2,209¡Â2.54, p¡Ã0.10; joint moments: F2,209¡Â4.80, p¡Ã0.01 for all interactions). Regardless of condition and time (side effect), subjects showed a dominant-leg predominant movement strategy. Specifically, the right side showed a greater peak vGRF (2%), and greater ankle (7%), knee (6%), and hip (11%) joint moments, as compared with the left side during jumping. The same movement pattern was observed during landing that there was greater peak vGRF (11%) and impulse (8%), and greater ankle and knee joint moments (15%). Regardless of time and side (condition effect), subjects with ankle joint cooling showed 5% lesser ankle joint moment during jumping, compared with those who received knee joint cooling (p=0.0001). CONCLUSIONS A 20-min of unilateral ankle or knee joint cooling seems to neither alter vertical jump height nor change movement biomechanics during two-legged jumping and landing.
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Á¤±Ù¿µ(Jeong, Keun-Young)
¼¼°èűǵµ¹®È­ÇÐȸ / ¼¼°èűǵµ¹®È­ÇÐȸÁö Á¦13±Ç Á¦2È£ / 2022 / 1-12 (12 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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This study was conducted to find out in what direction cyber education is good for Taekwondo education, especially youth, and what social meaning it has in the era of Metaverse, and the following conclusions were drawn. First of all, due to COVID-19, it was possible to confirm the trend of changing the social atmosphere to a method using Metaverse, that is, cyberspace. In addition, education tailored to various Metaverse times is also required, and efforts are being made to establish a paradigm of a new era in each field of education in line with these demands. And Taekwondo is expected to have a large effect because it is smooth to switch to cyber education and has high accessibility to youth, the main learners. And the fact that individual training takes place in cyberspace is also the basis for Taekwondo to be meaningful as a major physical activity education event in the Metaverse era. And it can be seen as an effort to adapt to the new paradigm, and Simulation claimed by Baudrillard can be applied as a criterion for interpreting this meaning. Simulation can be a social theory that can reveal a new phase of education that can replace reality, and this attempt is thought to serve as a stepping stone for stable settlement in the future cyber education era.
¸¶½ºÅ© Âø¿ë ÈÆ·ÃÀÌ Å±ǵµ ¼±¼öµéÀÇ ½Åü±¸¼º, ü·Â, Ç÷¾×º¯Àΰú °ñ¹Ðµµ¿¡ ¹ÌÄ¡´Â ¿µÇâ
¸¶½ºÅ© Âø¿ë ÈÆ·ÃÀÌ Å±ǵµ ¼±¼öµéÀÇ ½Åü±¸¼º, ü·Â, Ç÷¾×º¯Àΰú °ñ¹Ðµµ¿¡ ¹ÌÄ¡´Â ¿µÇâ
ÀÌÀçÀ²(Lee, Jae-Yul);±èÅÂÈ£(Kim, Tae-Ho);À̰­±¸(Lee, Kang-Koo)
¼¼°èűǵµ¹®È­ÇÐȸ / ¼¼°èűǵµ¹®È­ÇÐȸÁö Á¦13±Ç Á¦2È£ / 2022 / 49-68 (20 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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The purpose of this study was to investigate changes in body composition, physical fitness levels, blood variables and bone mineral density in Taekwondo athletes through 12 weeks of mask-wearing training. A total of 33 Taekwondo athletes participated in this study and they were divided into three groups: Gyeorugi (n=11), Poomsae (n=11), and Demonstration (n=11). Data analysis was performed using paired t-test and two-way ANOVA by SPSS ver.26. It was found that 12 weeks of mask-wearing training had a significant effect on body composition, predicted Vo2max, muscular endurance, flexibility and muscle power. However, in the case of bone mineral density, was not changed statistically significant level. We suggest that In the future, it is necessary to include the group of not mask- wearing training and various age and gender groups as a control group.
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±èºÀ°æ(Kim, Bong-Gyung)
¼¼°èűǵµ¹®È­ÇÐȸ / ¼¼°èűǵµ¹®È­ÇÐȸÁö Á¦13±Ç Á¦2È£ / 2022 / 103-119 (17 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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The purpose of this study is to investigate the effect of the electronic body protector¡¯s experience value according to the level of taekwondo involvement on the loyalty through the athlete¡¯s emotional response. A total of 287 questionnaires were collected from october to november 2021. For data processing, SPSS V.23.0 and AMOS 23.0 were used. The result is as follows. First, the experience value was found to have a significant effect on the pleasure. Second, experience value was found to have a significant effect on the arousal. Third, experience value was found to not have a significant effect on the dominance. Fourth, pleasure was found to not have a significant effect on the loyalty. Fifth, arousal was found to not have a significant effect on the loyalty. Sixth, dominance was found to not have a significant effect on the loyalty. Seventh, The influence of experience value on the loyalty through the athlete¡¯s emotional response showed differences depending on taekwondo involvement.
Reliability and Validity of the Kinect-Based Mixed Reality Device: Pilot Study
Reliability and Validity of the Kinect-Based Mixed Reality Device: Pilot Study
So-Young Ahn;Yun-Ho Sung;Jun-Hyun Bae;Byung-Gul Lim;Wook Song
´ëÇѿÇÐȸ / ¾Æ½Ã¾Æ ¿îµ¿ÇÐ ÇмúÁö Á¦24±Ç Á¦2È£ / 2022 / 2-11 (10 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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OBJECTIVES Firefighter (FF) is an occupation which needs high fitness abilities. However, most of Korean FFs in the capital city have relatively low fitness levels and they have difficulty participating in exercises owing to their emergency environments. Kinect-based mixed reality device (KMR) is a device that can deliver exercises with live visual feedbacks by detecting motions at any time while needing few human resources. Therefore, KMR could be an adequate tool for FFs to provide exercise. However, there are no studies that identified the reliability and validity. So, the purpose of this study is to evaluate the reliability and validity of KMR and the intensity of the fitness program for relatively low-fit FFs. METHODS Using a test-retest design, five male participants underwent three trials with 1wk washouts. The participants underwent 1 screening and 2 workout sessions. The fitness program using KMR last approximately 25 min. Intensity was measured using the heart rate (HR), rated perceived exertion (RPE), and finger-tip lactate. HR and RPE were measured before, during, and after the exercise using the Polar watch and Borg scale. Finger-tip lactate were measured before and after the exercise using Lactate Pro2. Cronbach alpha and Pearson correlation were determined for reliability and validity based on the HR and RPE. RESULTS Excellent reliability (Cronbach alpha: 0.967, 0.969) and strong correlation (r = .525 - .814, .718 - .958; very large) were observed with regard to the HR and RPE. Additionally, HR, RPE, and post-workout lactate showed a moderate-to-high intensity response in exercise program. Conclusions: The results suggest that KMR is a reliable and validate device to provide fitness programs and the fitness program designed for relatively low-fit FFs showed a ¡°moderate-to-high¡± intensity response, which is an adequate physiological response for relatively low-fit Korean FFs.
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¼¼°èűǵµ¹®È­ÇÐȸ / ¼¼°èűǵµ¹®È­ÇÐȸÁö Á¦13±Ç Á¦2È£ / 2022 / 1-1 (1 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
* ÀÌ ³í¹®Àº ÀúÀÛ±ÇÀÚÀÇ ¿äûÀ¸·Î ¹«·á·Î Á¦°øµË´Ï´Ù.
Effects of 24 Weeks Combined Rehabilitation Exercise Program on Functional Recovery in Obsess High Tibial Osteotomy Patients
Effects of 24 Weeks Combined Rehabilitation Exercise Program on Functional Recovery in Obsess High Tibial Osteotomy Patients
Min-Ah Kim;Kwang-Jin Lee;Keun-Ok An
´ëÇѿÇÐȸ / ¾Æ½Ã¾Æ ¿îµ¿ÇÐ ÇмúÁö Á¦24±Ç Á¦2È£ / 2022 / 29-37 (9 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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OBJECTIVES This study aims to investigate the effects of a 24 weeks combined rehabilitation exercise program on the subjective questionnaire, isokinetic muscle function test and dynamic balance test of high tibial osteotomy patients with normal weights and obese individuals. METHODS Sixteen tibial osteotomy patients were recruited in the study. They were divided into two groups(normal weight group[n=8] or obesity weight group[n=8]). A pre-test consisting of subjective questionnaire, isokinetic muscle function test and Y balance test. Using the same test in 12 weeks, 24 weeks after the surgery. All groups completed the rehabilitation exercise program for the duration of 24 weeks. RESULTS The significant interaction was observed between group and time on the involve bilateral flexor strength deficits (p=.045) and the posteromedial reach distance (p=.041). CONCLUSIONS These results suggest that a 24 weeks rehabilitation exercise program is needed after high tibial osteotomy in order to restore the same level of activity as before surgery.
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´ëÇÐűǵµ¼±¼öÀÇ ½Ç¼öÀνİú ÀǵµÀû ¿¬½À ¹× ÀÎÁöµÈ °æ±â·ÂÀÇ °ü°è
ÃÖºÀÁØ(Choi, Bong Jun);¿ø¼¼Á¾(Won, Se-Jong)
¼¼°èűǵµ¹®È­ÇÐȸ / ¼¼°èűǵµ¹®È­ÇÐȸÁö Á¦13±Ç Á¦2È£ / 2022 / 31-47 (17 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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The purpose of this study was to investigate the relationship of perception of error, deliberate practice, and perceived performance of University Taekwondo Athletes. To this end, 321 Taekwondo athletes (male 207, female 114) participated in this study. Collected data were analyzed by descriptive statistics, correlation, and multiple regression using SPSS 22.0 version. The results revealed as follow. First, learning from error, error risk taking, and thinking about error had a positive effect on deliberate practice. Second, learning from error and thinking about error had a positive effect on performance satisfaction while error risk taking and thinking about error had a positive effect on will to win. Third, deliberate practice had a positive effect on performance satisfaction and will to win. In conclusion, athletes¡¯ perception of error is key component to enhance deliberate practice and perceived performance. Furthermore, deliberate practice was also identified as a variable that improves perceived performance.
To Readers, Please Submit Your Articles to AJK
To Readers, Please Submit Your Articles to AJK
Miyakawa Shumpei
´ëÇѿÇÐȸ / ¾Æ½Ã¾Æ ¿îµ¿ÇÐ ÇмúÁö Á¦24±Ç Á¦2È£ / 2022 / 1-1 (1 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
* ÀÌ ³í¹®Àº ÀúÀÛ±ÇÀÚÀÇ ¿äûÀ¸·Î ¹«·á·Î Á¦°øµË´Ï´Ù.
űǵµÀå °æ¿µÀÚÀÇ À§±â Ä¿¹Â´ÏÄÉÀÌ¼Ç Àü·«ÀÌ °æ¿µ ÁöÇ⼺ ¹× °æ¿µ¼º°ú¿¡ ¹ÌÄ¡´Â ¿µÇâ
űǵµÀå °æ¿µÀÚÀÇ À§±â Ä¿¹Â´ÏÄÉÀÌ¼Ç Àü·«ÀÌ °æ¿µ ÁöÇ⼺ ¹× °æ¿µ¼º°ú¿¡ ¹ÌÄ¡´Â ¿µÇâ
±è¿ì½Ä(Kim, Woo-Sik);±èº´À±(Kim, Byung-Youn)
¼¼°èűǵµ¹®È­ÇÐȸ / ¼¼°èűǵµ¹®È­ÇÐȸÁö Á¦13±Ç Á¦2È£ / 2022 / 85-101 (17 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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The purpose of this study is to investigate the causal relationship between management orientation and management performance by combining the crisis communication strategy of Taekwondo managers with SNS. A total of 193 samples were sampled from January 3 to February 25, 2022 for Taekwondo managers located in the Chungcheong area, frequency analysis confirmatory factor analysis, reliability analysis, correlation analysis, and structural model were performed through SPSS and AMOS. First, hypotheses 1-3 were adopted as the risk communication strategy had a positive (+) effect on management orientation. Second, Hypothesis 2 was adopted as that management orientation has a positive (+) effect on management performance. Third, crisis communication strategy was found to have a positive (+) effect on business performance. Therefore, Hypothesis 3-1, 3 were adopted. The characteristics of SNS were revealed through the research results in that they can derive meaningful results in a crisis situation.
Effect of Clubbell Training on Glenohumeral Internal and External Rotation, Muscle Function, and Ball Velocity in Baseball Pitchers
Effect of Clubbell Training on Glenohumeral Internal and External Rotation, Muscle Function, and Ball Velocity in Baseball Pitchers
Won-Ho Choi;Jung-No Lee
´ëÇѿÇÐȸ / ¾Æ½Ã¾Æ ¿îµ¿ÇÐ ÇмúÁö Á¦24±Ç Á¦2È£ / 2022 / 19-28 (10 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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OBJECTIVES This study examined the effects of clubbell exercises in a pitcher training program on the range of motion (ROM), muscle function, and its subsequent influence on pitching velocity. Additionally, this study aimed to develop an optimal training program to prevent injury while improving pitcher performance. METHODS Eighteen pitchers were included and equally divided into clubbell exercise and control groups. Clubbell training was conducted through 60-minute sessions twice a week for 12 weeks. Internal/external rotational (IR/ER) ROM, IR/ER muscle strength, muscle endurance, muscle power, and pitching velocity were measured before and after the intervention. RESULTS The IR (p = 0.051) and total ROM (TROM; p = 0.05) of the throwing arm decreased in the control group but increased in the clubbell exercise group, with an observed tendency of interaction. In the non-throwing arm, the ER ROM was significantly different between the two groups (p <0 .05), also with an observed tendency of interaction (p = 0.055). IR peak torque per body weight at 60¡Æ/sec significantly increased in both groups over the exercise period (p < 0.01). Total work per body weight and average power of IR at 180¡Æ/sec increased in both groups over the exercise period (p < 0.01). The pitching velocity decreased in both groups throughout the exercise period (p < 0.05). CONCLUSIONS Although 12 weeks of clubbell training had limited effects on ROM, the findings revealed that this exercise could be effective in improving pitching performance, preventing injuries, and maintaining long-term performance. Further studies are recommended for a more detailed assessment.
Effects of Downhill Running Exercise on Glucose Tolerance and Skeletal Muscle P-AMPK Expression in Type II Diabetes Rats
Effects of Downhill Running Exercise on Glucose Tolerance and Skeletal Muscle P-AMPK Expression in Type II Diabetes Rats
Sung-Tae Park
´ëÇѿÇÐȸ / ¾Æ½Ã¾Æ ¿îµ¿ÇÐ ÇмúÁö Á¦24±Ç Á¦2È£ / 2022 / 49-55 (7 pages)
¿¹¼úüÀ°>üÀ° / KDC : ¿¹¼ú > ¿À¶ô, ¿îµ¿ / KCI : ¿¹¼úüÀ° > üÀ°
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OBJECTIVES The purpose of this study was to investigate the effects of moderate downhill running exercise on glucose tolerance and skeletal muscle phospho-AMP activated protein kinase(P-AMPK) expression in type ¥± diabetes rats. METHODS 8-week-old, 24 wistar & GK rats (type ¥± diabetes model) were randomly divided into 4 groups, NR, NE, DR, DE. Downhill running treatment were performed on the treadmill at the -16 % and speed of 16m/min for 1 hour. All groups were done with Oral glucose tolerance test(OGTT) and after 1 week washout period, rats in exercise groups performed downhill running. After exercise treatment, soleus muscle of rats were extracted for test of P-AMPK expression. RESULTS In OGTT, blood glucose levels in all groups were increased after the oral glucose load and these were significantly differ from rest level. But in DE group, blood glucose level at 120 min after OGTT was not significantly differ from rest level. In immunoblotting test for P-AMPK expression of skeletal muscle, NE group was significantly higher than NR group and DE group was significantly higher than other groups. CONCLUSIONS Downhill running exercise improved glucose tolerance and increased P-AMPK expression of skeletal muscle in type ¥± diabetes rats.